Touch Display Apparatus

1. A touch display apparatus comprising: a display panel on which pixels and touch electrodes are disposed; a main power integrated circuit configured to generate a common voltage signal applied to the touch electrodes and at least one gate voltage signal applied to the pixels; a touch power integrated circuit configured to: output a touch driving signal of a pulse type in accordance with a touch synchronization signal that defines a display driving period and a touch driving period, output a load free driving signal of the pulse type by using a gate low voltage signal of the at least one gate voltage signal, and output at least one pseudo touch driving signal corresponding to a pulse pattern of the touch driving signal and the load free driving signal and having reverse phase which is inverted, by using at least one gate high voltage signal of the at least one gate voltage signal; and a gate driving circuit configured to: supply a gate pulse based on the at least one gate voltage signal to gate lines connected to the pixels for the display driving period, and supply the load free driving signal to the gate lines for the touch driving period.

2. The touch display apparatus of claim 1 , wherein the touch power integrated circuit is configured to generate the touch driving signal and the load free driving signal based on the touch synchronization signal and a touch pulse control signal for touch sensing.

3. The touch display apparatus of claim 2 , wherein the touch pulse control signal includes at least one of a beacon signal, a ping signal, or a load free driving (LFD) signal.

4. The touch display apparatus of claim 1 , wherein the common voltage signal output from the main power integrated circuit and the at least one gate voltage signal are direct current voltage signals.

5. The touch display apparatus of claim 1 , wherein the touch power integrated circuit is configured to: generate the touch driving signal by pulse-converting the common voltage signal, generate the load free driving signal by pulse-converting the gate low voltage signal, generate a first pseudo touch driving signal by pulse-converting a first gate high voltage signal of the at least one gate high voltage signal and inverting phase of the pulse-converted signal, and generate a second pseudo touch driving signal by pulse-converting a second gate high voltage signal of the at least one gate high voltage signal and inverting phase of the pulse-converted signal.

6. The touch display apparatus of claim 5 , wherein the first gate high voltage signal has a first voltage level that is greater than a second voltage level of the second gate high voltage signal.

7. The touch display apparatus of claim 5 , further comprising: first power lines disposed to adjoin each other in the form of a pair; second power lines disposed to adjoin each other in the form of a pair; and a ground line disposed between the first power lines and the second power lines, wherein the load free driving signal and the first pseudo touch driving signal are applied to the display panel through the first power lines, and the touch driving signal and the second pseudo touch driving signal are applied to the display panel through the second power lines.

8. The touch display apparatus of claim 1 , wherein the gate driving circuit is configured to not supply the at least one pseudo touch driving signal to the gate lines for the touch driving period.

9. A touch display apparatus comprising: a display panel on which pixels and touch electrodes are disposed; a main power integrated circuit configured to generate a common voltage signal applied to the touch electrodes and at least one gate voltage signal applied to the pixels; a touch power integrated circuit configured to: output a first touch driving signal of a pulse type in accordance with a touch synchronization signal that defines a display driving period and a touch driving period, and output a first load free driving signal of the pulse type by using a gate low voltage signal of the at least one gate voltage signal; a signal converter configured to output a pseudo touch driving signal by converting a phase of the first load free driving signal; and a signal recovery unit disposed at an input front end of the pixels, the signal recovery unit configured to recover the first load free driving signal from the pseudo touch driving signal.

10. The touch display apparatus of claim 9 , wherein the signal converter is configured to: generate a second touch driving signal by dropping a voltage level of the first touch driving signal, generate a second load free driving signal by dropping a voltage level of the first load free driving signal, and generate the pseudo touch driving signal by dropping the voltage level of the first load free driving signal and inverting phase of the signal of which voltage level has been dropped.

11. The touch display apparatus of claim 10 , wherein the signal recovery unit is configured to: recover the first touch driving signal by amplifying the second touch driving signal through a non-inversion amplification, and recover the first load free driving signal by amplifying the pseudo touch driving signal through an inversion amplification.

12. The touch display apparatus of claim 9 , further comprising a gate driving circuit configured to: supply a gate pulse based on the at least one gate voltage signal to gate lines connected to the pixels for the display driving period, and supply the first load free driving signal recovered by the signal recovery unit to the gate lines for the touch driving period.

13. The touch display apparatus of claim 10 , further comprising power lines disposed to adjoin each other in the form of a pair, wherein the pseudo touch driving signal and the second touch driving signal are applied to the display panel through the power lines.

14. The touch display apparatus of claim 13 , further comprising power lines configured to receive a first gate high voltage signal and a second gate high voltage signal of the at least one gate voltage signal and disposed between the power lines disposed to adjoin in each other in the form of a pair.

15. The touch display apparatus of claim 13 , further comprising a gate driving circuit configured to: supply a gate pulse based on the at least one gate voltage signal to gate lines connected to the pixels for the display driving period, and supply the first load free driving signal recovered by the signal recovery unit to the gate lines for the touch driving period, wherein the signal converter is configured to output the second load free driving signal and the pseudo touch driving signal, and the gate driving circuit includes: a level shifter configured to generate a gate pulse based on the at least one gate voltage signal, the second load free driving signal, and the pseudo touch driving signal; and a shift register configured to sequentially supply the gate pulse output from the level shifter to the gate lines connected to the pixels.

16. The touch display apparatus of claim 15 , wherein the level shifter includes: an N−1th clock configured to output an N−1th gate pulse, wherein N is a natural number of 2 or more; and an Nth clock configured to output an Nth gate pulse, wherein the N−1th clock is configured to: output the N−1th gate pulse based on a gate high voltage signal of the at least one gate voltage signal for the display driving period, and output an N−1th touch driving gate pulse based on the pseudo touch driving signal for the touch driving period, and wherein the Nth clock is configured to: output the Nth gate pulse based on the gate high voltage signal of the at least one gate voltage signal for the display driving period, and output an Nth touch driving gate pulse based on the second load free driving signal for the touch driving period.

17. The touch display apparatus of claim 16 , further comprising a gate signal recovery unit at an input front end of the gate lines, wherein the gate signal recovery unit is configured to: output the N−1th touch driving gate pulse based on the pseudo touch driving signal through an inversion amplification, and output the Nth touch driving gate pulse based on the second load free driving signal through a non-inversion amplification.

18. A touch display apparatus comprising: a touch panel including a plurality of touch electrodes and a plurality of touch lines; a touch driving circuit configured to sense the plurality of touch electrodes through the plurality of touch lines; and a touch power circuit configured to transfer a touch driving signal to the touch driving circuit through a touch signal line, wherein the touch power circuit is configured to: apply the touch driving signal to the touch signal line for a touch sensing period of the touch panel, and apply a pseudo touch driving signal corresponding to a first pulse waveform of the touch driving signal to a pseudo touch signal line disposed to adjoin the touch signal line in the form of a pair, the pseudo touch driving signal having a second pulse waveform, and wherein the first pulse waveform and the second pulse waveform are 180 degrees out of phase with each other.

19. The touch display apparatus of claim 18 , further comprising a display panel on which a plurality of gate lines are disposed, and a gate driving circuit configured to drive the plurality of gate lines, wherein the touch power circuit is configured to: transfer a gate load free driving signal to the gate driving circuit through a gate signal line, and apply a pseudo gate load free driving signal corresponding to a third pulse waveform of the gate load free driving signal to a pseudo gate signal line disposed to adjoin the gate signal line for the touch sensing period of the touch panel, the pseudo gate signal line having a fourth pulse waveform, and wherein the third pulse waveform and the fourth pulse waveform are 180 degrees out of phase with each other.

20. The touch display apparatus of claim 19 , wherein the touch signal line and the gate signal line are disposed outside the display panel, and a ground line is disposed between the touch signal line and the gate signal line.